User Manual

Routing
286
M6100 Web Management User Guide
Table 107. OSPF External Link State Database Table
Field Description
Router ID The 32-bit integer in dotted decimal format that
uniquely identifies the router within the autonomous
system (AS).
The Router ID is set on the IP
Configuration page. If you want to change the Router
ID you must first disable OSPF. After you set the new
Router ID, you must re-enable OSPF to have the
change take effect. The default value is 0.0.0.0,
although this is not a valid Router ID.
LSA Type The format and function of the link state
advertisement. LSA
Type is one of the following:
• ASBR Summary
• AS-external
• NSSA
• TMP2
LS ID The Link State ID identifies the piece of the routing
domain that is being described by the advertisement.
The value of the LS ID depends on the
advertisement's LS type.
Age The time since the link state advertisement was first
originated, in seconds.
Sequence The sequence number field is a signed 32-bit integer.
It is used to detect old and duplicate link state
advertisements.
The larger the sequence number,
the more recent the advertisement.
Checksum The checksum is used to detect data corruption of an
advertisement.
This corruption can occur while an
advertisement is being flooded, or while it is being
held in a router's memory. This field is the checksum
of the complete contents of the advertisement,
except the LS age field.
AS Opaque Link State Database Table
Table 108, OSPF AS Opaque Link State Database Table describes the non-configurable
data that is displayed in the AS Opaque Link State Database (LSDB) table.
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